Effects of Sward Cleavage Treatment on Vegetation Characteristics under Different Terrain in Alpine Meadows-steppe

doi:10.11733/j.issn.1007-0435.2016.02.010

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (2): 309-316.DOI: 10.11733/j.issn.1007-0435.2016.02.010

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Effects of Sward Cleavage Treatment on Vegetation Characteristics under Different Terrain in Alpine Meadows-steppe

LI Xiao-long, CAO Wen-xia, XU Chang-lin, LI Wen, LIU Hao-dong, ZHANG Xiao-yan, SHI Shang-li

Grassland Science College of Gansu Agricultural University, Grassland Ecosystem Key Laboratory of Ministry of Education, Sino-U. S. Research Centers for Sustainable Grassland and Livestock Management, Lanzhou, Gansu Province 730030, China

Received:2015-04-02 Revised:2015-12-15 Online:2016-04-15 Published:2016-06-06

划破草皮对不同地形高寒草甸草原植被特征的影响

李小龙, 曹文侠, 徐长林, 李文, 刘浩栋, 张晓燕, 师尚礼

甘肃农业大学草业学院草业生态系统教育部重点实验室中-美草地畜牧业可持续发展研究中心, 甘肃兰州 730070

通讯作者: 曹文侠
作者简介:李小龙(1989-),男,甘肃通渭人,硕士研究生,主要研究方向为草地生物多样性,E-mail:405952804@qq.com
基金资助:
国家自然科学基金(31360569);现代农业产业技术体系(CARS-35);甘肃省农牧厅"退牧还草科技支撑项目";"青藏高原打草场建设项目"资助

Abstract

Abstract:

Effects of sward cleavage on vegetation community characters and underground biomass were determined and conducted in the area of ground and slop, which was located in Eastern Alpine Meadow-steppe of Qinghai-Tibet Plateau. The results showed that the improving effect of sward cleavage on the soil water content of the ground was significantly higher than slop. Also, it was increased to the original dominant species and height of Gramineae grass in the area of ground, but reduced the original dominant species and height of cyperaceae in slope. Moreover, the density of gramineous grass was significantly increased, but the density of the miscellaneous grass decreased in the area of ground and slop after treated by the method of sward cleavage, compared with control. The biomass of miscellaneous grass in the area of ground and slop were decreased by sward cleavage, and the underground or aboveground biomass was significantly higher than control, especially the biomass of Gramineae grass was significantly higher in ground. Therefore, it is indicated that the method of sward cleavage will be considered as an effective improving method in ground, but it limited in slop. In addition, we should select different methods in different local areas, and consider the constraint conditions practically while choosing the sward cleavage method to improve different terrain of Alpine Meadows-steppe.

Key words: Alpine meadow-steppe, Cleavage treatment, Different terrain, Vegetation characters

摘要：

在青藏高原东缘东祁连山高寒草甸草原开展平地和坡地划破草皮试验,研究了划破草皮对植物群落特征及地下生物量的影响。结果表明:划破处理对平地土壤含水量的改良效果显著优于坡地。划破处理增加了平地禾本科优势度而降低了坡地莎草科优势度。增加了平地禾本科高度,降低了坡地莎草科高度。平地和坡地划破区杂类草密度显著低于对照区,平地禾本科密度显著增加。与对照区相比,两种地形划破草皮都能减少杂类草生物量,平地划破区禾本科生物量显著增加,地下生物量/地上生物量显著大于对照区。说明划破草皮在平地是一种有效的改良措施,而在坡地改良效果不显著,建议在使用划破草皮技术改良高寒草甸草原时,应因地制宜,充分考虑制约条件。

关键词: 高寒草甸草原, 划破草皮, 不同地形, 植被特征

CLC Number:

S812.8

LI Xiao-long, CAO Wen-xia, XU Chang-lin, LI Wen, LIU Hao-dong, ZHANG Xiao-yan, SHI Shang-li. Effects of Sward Cleavage Treatment on Vegetation Characteristics under Different Terrain in Alpine Meadows-steppe[J]. Acta Agrestia Sinica, 2016, 24(2): 309-316.

李小龙, 曹文侠, 徐长林, 李文, 刘浩栋, 张晓燕, 师尚礼. 划破草皮对不同地形高寒草甸草原植被特征的影响[J]. 草地学报, 2016, 24(2): 309-316.

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Effects of Sward Cleavage Treatment on Vegetation Characteristics under Different Terrain in Alpine Meadows-steppe

划破草皮对不同地形高寒草甸草原植被特征的影响

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